/Engine/Source/Runtime/Landscape/Classes/LandscapeProxy.h
struct FGrassCompKey
TWeakObjectPtr<...
BasedOn
int32
CachedMaxInstancesPerComponent
TWeakObjectPtr<...
GrassType
int32
NumVarieties
int32
SqrtSubsections
int32
SubsectionX
int32
SubsectionY
int32
VarietyIndex